American pop singer Katy Perry is to become the latest celebrity to make a guest appearance in the live-action Christmas special of The Simpsons, it's been revealed. The special episode, which will air December 5 on Sky 1, will see the cast of the show as puppets in a parody of Sesame Street.
The idea came after Katy Perry's appearance in the real US kids show was cancelled - due to her low cut top. Producer Al Jean joked: "In the wake of Elmo's terrible betrayal, the Simpsons puppets wish to announce they stand felt-shoulder-to-shoulder with Katy Perry."
Katy will join the cast in a rendition of 'The 39 Days of Christmas' during the episode, which is titled 'The Fight Before Christmas'.
The episode will air on Sunday December 5.